| Section 1 | Cross Timbers Energy Services, Inc. #33618 |
| Section 2 | Pioneer Natural Resources USA, Inc. #33615 |
| Section 3 | Black Hills Utility Holdings, Inc. #33599 |
| Section 4 | Black Hills Utility Holdings, Inc. #33629 |
| Section 5 | Black Hills Utility Holdings, Inc. #33640000 |
| Section 6 | Colorado Springs Utilities #33247000 |
| Section 7 | Public Service Company of Co. |
| Section 8 | Noble Energy, Inc. |